Devices that are used to convert electrical energy into heat energy are

Options

A. toaster and mixer
B. geyser and heater
C. electric iron and speaker
D. TV and radio

Explanation

To answer the question, "Devices that are used to convert electrical energy into heat energy are," we will analyze the options provided and determine which devices serve this purpose.

### Step-by-Step Solution:

1. **Understanding the Question**:
- We need to identify devices that specifically convert electrical energy into heat energy.

2. **Analyzing Option 1: Toaster and Mixer**:
- A **toaster** converts electrical energy into heat energy to toast bread.
- A **mixer**, however, converts electrical energy into mechanical energy to mix ingredients.
- **Conclusion**: This option is incorrect because the mixer does not convert electrical energy into heat energy.

3. **Analyzing Option 2: Geyser and Heater**:
- A **geyser** uses electrical energy to heat water, thus converting it into heat energy.
- A **heater** also converts electrical energy into heat energy to warm up a space.
- **Conclusion**: This option is correct as both devices convert electrical energy into heat energy.

4. **Analyzing Option 3: Electric Iron and Speaker**:
- An **electric iron** converts electrical energy into heat energy to press clothes.
- A **speaker**, on the other hand, converts electrical energy into sound energy.
- **Conclusion**: This option is incorrect because the speaker does not convert electrical energy into heat energy.

5. **Analyzing Option 4: TV and Radio**:
- A **TV** converts electrical energy into light and sound energy.
- A **radio** converts electrical energy into sound energy.
- **Conclusion**: This option is incorrect as neither device converts electrical energy into heat energy.

6. **Final Conclusion**:
- The only option that includes devices which convert electrical energy into heat energy is **Option 2: Geyser and Heater**.

### Final Answer:
Devices that are used to convert electrical energy into heat energy are **Geyser and Heater**.

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